Video encoding method and system
a video and video encoding technology, applied in the field of video encoding methods and systems, can solve the problems of inability to achieve multi-pass encoding, inability to monitor video, and inability to achieve time-consuming encoding in a surveillance system, etc., to achieve the effect of reducing the noise level, and improving the quality of the area of more nois
Active Publication Date: 2019-06-20
AXIS
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Benefits of technology
The patent text describes a method for reducing the time and processing power needed to encode image frames into video streams. By analyzing the image data to determine which areas are more relevant, the encoding process can be narrowed down to those areas only. This saves time and processing power, especially when the camera is moving during a pan or tilt operation. The result is a video stream that is blurrier in areas where the camera is moving and less data is needed for storage. The technical effect is faster and more efficient video encoding.
Problems solved by technology
Hence, the devices performing encoding are often devices having limited processing power and / or storage.
Such time-consuming encoding is not viable in a surveillance system.
In addition, the multiple pass encoding requires more memory and processing cycles than most surveillance cameras are designed for.
This exhaustive search for optimal sizes results in high computational complexity and will use a non-acceptable high amount of the processing power and memory capacity of a device that has restricted processing power and memory capacity.
From the above we may conclude that many block based encoding schemes, implementing some kind of coding tree structure, waste a lot of processing power, encoding time, and data storage for achieving encoding with high image quality and using few data bits.
However, in applications for capturing live video, using a device having limited computational resources, limited access to power, and limited data storage, these encoding schemes are not applicable.
Method used
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[0047]The present invention relates to a method for encoding a video stream and to devices encoding a video stream. FIG. 4 shows an environment where an embodiment of the method for encoding a video stream may be used, and where embodiments of devices that are enabled to encode according to the invention may be arranged. This environment may include a data network 402 for transmission of video streams, a digital network camera 404 connected to the network 402, a networked digital video encoding device 406 connected to an analogue video generator 408, e.g. an analogue video camera 408, a video server 410 for storing encoded video received via the network 402, and a client 412 for accessing and / or displaying encoded video streams via the network 402.
[0048]The devices in FIG. 4 are typical devices in an environment of the invention. However, a network 402, connecting one or more devices enabled to encode a video stream in accordance with the invention, may connect to any number of the ...
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The present invention relates to a system and a method for encoding a video stream. The encoding includes determining a level of relevance for areas in an image frame to be included in the video stream, determining a block size value for coding blocks in the image frame, the block size value is depending on the level of relevance determined for the area including each coding block, respectively, encoding the image frame using coding block sizes based on the determined block size values for each of the coding blocks.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to European Patent Application No. 17208292.7, filed on 19 Dec. 2017, the entire contents of which being incorporated herein by reference.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates to a method and a system for encoding video.BACKGROUND OF THE INVENTION[0003]Video encoding of today is becoming more and more efficient and enables video data to be stored on hard drives and sent over communications networks. In the surveillance industry, a lot of video data is generated every day. The video data in surveillance systems is largely comprised of live video data. This live video data needs to be encoded on the fly, in order to be delivered substantially instantaneously and be relevant for the systems and persons depending on the video for swift and correct decisions. Generally, the video data in a surveillance system needs to be encoded in the device capturing the video, e.g. in a video cam...
Claims
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IPC IPC(8): H04N19/122H04N19/137H04N19/154H04N19/176
CPCH04N19/122H04N19/137H04N19/154H04N19/176H04N19/119H04N19/172H04N19/136H04N19/174
Inventor PIHL, FREDRIKFAN, XING DANIELSSON
Owner AXIS